In the following food items, which one has the highest ‘Glycemic Index’
**Core Concept**
The Glycemic Index (GI) is a measure of how quickly the carbohydrates in a particular food raise blood sugar levels after consumption. The GI is calculated based on the area under the glucose response curve after consuming 50g of carbohydrates from the test food compared to a reference food, typically pure glucose.
**Why the Correct Answer is Right**
The GI is influenced by the type and amount of carbohydrate, fiber, and other nutrients present in the food. Foods with a high GI are quickly digested and absorbed, causing a rapid increase in blood glucose levels. White bread, pure glucose, and other refined carbohydrates have a high GI due to their high glycemic load and low fiber content. In contrast, whole grains, fruits, and vegetables have a lower GI due to their slower digestion rate and higher fiber content.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a complex carbohydrate source rich in fiber and nutrients, which slows down digestion and absorption, resulting in a lower GI.
**Option B:** This option is incorrect because it is a low-carbohydrate food, which does not significantly raise blood glucose levels.
**Option C:** This option is incorrect because it is a high-fiber food, which slows down digestion and absorption, resulting in a lower GI.
**Clinical Pearl / High-Yield Fact**
To quickly estimate the GI of a food, look for the following characteristics: high carbohydrate content, low fiber content, and the presence of added sugars or refined carbohydrates.
**Correct Answer:** A. White bread.